Improvement in apparatus for drying and pressing lard-scraps



antasara anni j affine ALBERT KILBERN HOWE,ZOF ,NEW YORK, N.YY., VASSIGNOR T0 HIMSELF,

H. EL DONQR'jAND-EDWARD PURDL 0F SAME PLACE.

Letters Patent No. 108,783, daad November 1, i870.

IMPROVEMENT INIAPPARATUS FOR DRYING AND PRESSING LARVD-SCRAPS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concer-n Be it known that. I, ALBERT KILBERN Howe, of the city of New York, in the county and State -of N ew York, have invented a new and improved Ap'- paratus for Drying and Pressing Lard-Scraps; and I do hereby declare that the vfollowing is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part of this specication.

Figure 1 represents a vertical central section of my improved scrap-drying and pressing machine.

Figure 2 is a detail vertical section of a modification of the same.

Figure 3 is a horizontal scction'ot the same, taken on the plane ofthe line a; x, tig. 1.

Similar letters of reference .indicate corresponding parts.

This invention relates to a new machine for treating the scraps of lard, with a view of extracting from the same all the oily or fatty substances which they may yet contain. Y

The chief object of therinvention is to so construct the apparatus that the process can be carried on without allowing the escape of the offensive odor which usually arises from such devices.

- T he invention consists chiefly in the use of a perforated vessel containing -a sliding piston, by means of' which the scraps can be compressed to discharge their fatty or oly substances through the apertures of' the vessels, while the scraps cannot escape. Instead of 'having the vessel perforated, the piston may have the apertures, and is, in that case, connected with a hollowpiston-rod, -so that the oily matter may be discharged through `said piston and rod. v

The invention consists, also, in the use within said vessel of a. series of steam-pipes or inlets, by means of which steam is'conducted to the vessel above the piston, for thoroughly boiling and agitating the scraps without permitting the steam to escape.

Finally, the invention consists in the application to said vessel of a false bottom and outer jacket, as hereinafter more fully described. y y

Ain the drawingrepresents a metallic vessel, of cylindrical or other form.

It is in avertical position, set upon a suitable frame, B, and is closed by a cover, C, which is fastened by means of screws, a, or other equivalent fastening devices.

The sidespf the vessel A are perforated, so that the interior of the cylinder communicates with an annular space, c, that is formed around said cylinder by means of an outer jacket, D.

Below thebottoin d ofthe cylinder is, by avlower plate, e, formed a chamber, f.

From the chamber f project` into the cylinder four, more or less, vertical pipes, E E, which reach to the cover C, or are otherwiseclosed at their upper ends, while near the same they are perforated, as shown. y

' A pipe, F, serves to let steam into the chamber f, whence, through the pipe E, such steam can escape int the upper part of the cylinder;

Another pipe, G, connects with the lower part of the cylinder, to let steam into the same, and has a downward-projecting branch, H, for carrying away the oil and condensed steam.

I is a piston, tted into the cylinder, and mounted upon a rod, J, by means of which it can be worked up and down at will, either by the aidof a screw-pinion, g, or other suitable mechanism.

'The lard to be treated is placed into the cylinder, and steam let in through the pipe E while the pistonis down.

When the lard has been thoroughly boiled and agitated, so that the oil has, in part, owed oli' i'uto the space O through the apertures in the sides b, the steam-pipe F-s closed, and thepiston worked up. At the same time `the steam is let in through the pipe G, so that it may enter the lower-part of the cylinder..Y

The piston compresses the scraps against the cover of the cylinder, pressing the oil or fat, together with the condensed steam, out through the apertures of the cylinder. The steam at the same time enters the space c,- and passes thence into thedupper part of the cylinder, confining the scraps in the center ofthe cylinder, and aiding in their more thorough compression.

After the scraps have been completely compressed,

the-steam is turned off and the pipe H opened, to let` the products of condensation, together with the liquid oil and fat, ilow away from the annular space c.

During the entire 4process the cylinder-is completely closed, so. that no vapor can escape.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The combination of the perforated cylinder A with the annular space c, chamberf, pipes E, and piston I, all arranged to operate substantially as herein shown and described.

ALBERT K. HOWE. Witnesses:

GEO.W. Maen, ALEX. F. ROBERTS. 

